svn commit: r45036 - head/en_US.ISO8859-1/books/handbook/config

Author: wblock
Date: Mon Jun  9 03:42:29 2014
New Revision: 45036
URL: http://svnweb.freebsd.org/changeset/doc/45036

Log:
  Add an example for 10.x swap files, clarify the existing examples for 9.x, use
  procedure instead of orderedlist, and factor out common parts.
  
  PR:		190759
  Submitted by:	[email protected]

Modified:
  head/en_US.ISO8859-1/books/handbook/config/chapter.xml

Modified: head/en_US.ISO8859-1/books/handbook/config/chapter.xml
==============================================================================
--- head/en_US.ISO8859-1/books/handbook/config/chapter.xml	Mon Jun  9 00:30:05 2014	(r45035)
+++ head/en_US.ISO8859-1/books/handbook/config/chapter.xml	Mon Jun  9 03:42:29 2014	(r45036)
@@ -1483,7 +1483,7 @@ cron.*                                  
       <para>For more information on all fields, valid flags, and how
 	to specify the rotation time, refer to &man.newsyslog.conf.5;.
 	Since <application>newsyslog</application> is run from
-	&man.cron.8;, it can not rotate files more often than it is
+	&man.cron.8;, it cannot rotate files more often than it is
 	scheduled to run from &man.cron.8;.</para>
     </sect2>
 
@@ -2757,55 +2757,85 @@ kern.maxvnodes: 100000</screen>
     <sect2 xml:id="create-swapfile">
       <title>Creating a Swap File</title>
 
-      <para>To instead create a swap file, specify its size.  The
-	following example creates a 64MB file named
-	<filename>/usr/swap0</filename>.</para>
+      <para>These examples create a 64M swap file
+	called <filename>/usr/swap0</filename> instead
+	of using a partition.</para>
+
+      <para>Using swap files requires that the module needed by
+	&man.md.4; has either been built into the kernel or has been
+	loaded before swap is enabled.  See
+	<xref linkend="kernelconfig"/> for information about building
+	a custom kernel.</para>
+
+      <example xml:id="swapfile-10-and-later">
+	<title>Creating a Swap File on &os; 10.<replaceable>X</replaceable> and Later</title>
+
+	<procedure>
+	  <step>
+	    <para>Create the swap file:</para>
 
-      <example>
-	<title>Creating a Swap File on &os;</title>
+	    <screen>&prompt.root; <userinput>dd if=/dev/zero of=<replaceable>/usr/swap0</replaceable> bs=1m count=<replaceable>64</replaceable></userinput></screen>
+	  </step>
 
-	<orderedlist>
-	  <listitem>
-	    <para>The <filename>GENERIC</filename> kernel already
-	      includes the required memory disk driver.  When building
-	      a custom kernel, make sure to include the following line
-	      in the custom configuration file:</para>
+	  <step>
+	    <para>Set the proper permissions on the new file:</para>
 
-	    <programlisting>device   md</programlisting>
+	    <screen>&prompt.root; <userinput>chmod 0600 <replaceable>/usr/swap0</replaceable></userinput></screen>
+	  </step>
 
-	    <para>For information on building a custom kernel, refer
-	      to <xref linkend="kernelconfig"/>.</para>
-	  </listitem>
+	  <step>
+	    <para>Inform the system about the swap file by adding a
+	      line to <filename>/etc/fstab</filename>:</para>
+
+	    <programlisting>md99	none	swap	sw,file=/usr/swap0	0	0</programlisting>
+
+	    <para>The &man.md.4; device <filename>md99</filename> is
+	      used, leaving lower device numbers available for
+	      interactive use.</para>
+	  </step>
+
+	  <step>
+	    <para>Swap space will be added on system startup.  To add
+	      swap space immediately, use &man.swapon.8;:</para>
+
+	    <screen>&prompt.root; <userinput>swapon -aq</userinput></screen>
+	  </step>
+	</procedure>
+      </example>
 
-	  <listitem>
+      <example xml:id="swapfile-9-and-earlier">
+	<title>Creating a Swap File on &os; 9.<replaceable>X</replaceable> and Earlier</title>
+
+	<procedure>
+	  <step>
 	    <para>Create the swap file,
 	      <filename>/usr/swap0</filename>:</para>
 
-	    <screen>&prompt.root; <userinput>dd if=/dev/zero of=<replaceable>/usr/swap0</replaceable> bs=1024k count=<replaceable>64</replaceable></userinput></screen>
-	  </listitem>
+	    <screen>&prompt.root; <userinput>dd if=/dev/zero of=<replaceable>/usr/swap0</replaceable> bs=1m count=<replaceable>64</replaceable></userinput></screen>
+	  </step>
 
-	  <listitem>
-	    <para>Then, set proper permissions on
+	  <step>
+	    <para>Set the proper permissions on
 	      <filename>/usr/swap0</filename>:</para>
 
 	    <screen>&prompt.root; <userinput>chmod 0600 <replaceable>/usr/swap0</replaceable></userinput></screen>
-	  </listitem>
+	  </step>
 
-	  <listitem>
+	  <step>
 	    <para>Enable the swap file in
 	      <filename>/etc/rc.conf</filename>:</para>
 
 	    <programlisting>swapfile="<replaceable>/usr/swap0</replaceable>"   # Set to name of swap file</programlisting>
-	  </listitem>
+	  </step>
 
-	  <listitem>
-	    <para>To enable the swap file immediately, specify a free
+	  <step>
+	    <para>Swap space will be added on system startup.  To enable the swap file immediately, specify a free
 	      memory device.  Refer to <xref linkend="disks-virtual"/>
 	      for more information about memory devices.</para>
 
 	    <screen>&prompt.root; <userinput>mdconfig -a -t vnode -f <replaceable>/usr/swap0</replaceable> -u <replaceable>0</replaceable> &amp;&amp; swapon /dev/md<replaceable>0</replaceable></userinput></screen>
-	  </listitem>
-	</orderedlist>
+	  </step>
+	</procedure>
       </example>
     </sect2>
   </sect1>
@@ -2911,7 +2941,7 @@ kern.maxvnodes: 100000</screen>
 
       <para>In &os; the &man.acpi.4; driver is loaded by default at
 	system boot and should <emphasis>not</emphasis> be compiled
-	into the kernel.  This driver can not be unloaded after boot
+	into the kernel.  This driver cannot be unloaded after boot
 	because the system bus uses it for various hardware
 	interactions.  However, if the system is experiencing
 	problems, <acronym>ACPI</acronym> can be disabled altogether
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